note 116108 added to function.strip-tags

As you probably know, the native function strip_tags don't work very well with malformed HTML when you use the allowed tags parameter. This is a very simple but effective function to remove html tags. It takes a list (array) of allowed tags as second parameter: <?php function flame_strip_tags($html, $allowed_tags=array()) { $allowed_tags=array_map(strtolower,$allowed_tags); $rhtml=preg_replace_callback('/<\/?([^>\s]+)[^>]*>/i', function ($matches) use (&$allowed_tags) { return in_array(strtolower($matches[1]),$allowed_tags)?$matches[0]:''; },$html); return $rhtml; } ?> The function works reasonably well with invalid/bad formatted HTML. Use: <?php $allowed_tags=array("h1","a"); $html=<<<EOD <h1>Example</h1> <dt><a href='/manual/en/getting-started.php'>Getting Started</a></dt> <dd><a href='/manual/en/introduction.php'>Introduction</a></dd> <dd><a href='/manual/en/tutorial.php'>A simple tutorial</a></dd> <dt><a href='/manual/en/langref.php'>Language Reference</a></dt> <dd><a href='/manual/en/language.basic-syntax.php'>Basic syntax</a></dd> <dd><a href='/manual/en/reserved.interfaces.php'>Predefined Interfaces and Classes</a></dd> </dl> EOD; echo flame_strip_tags($html,$allowed_tags); ?> The output will be: <h1>Example</h1> <a href='/manual/en/getting-started.php'>Getting Started</a> <a href='/manual/en/introduction.php'>Introduction</a> <a href='/manual/en/tutorial.php'>A simple tutorial</a> <a href='/manual/en/langref.php'>Language Reference</a> <a href='/manual/en/language.basic-syntax.php'>Basic syntax</a> <a href='/manual/en/reserved.interfaces.php'>Predefined Interfaces and Classes</a> ---- Server IP: 72.52.91.14 Probable Submitter: 92.57.76.49 ---- Manual Page -- http://php.net/manual/en/function.strip-tags.php Edit -- https://master.php.net/note/edit/116108 Del: integrated -- https://master.php.net/note/delete/116108/integrated Del: useless -- https://master.php.net/note/delete/116108/useless Del: bad code -- https://master.php.net/note/delete/116108/bad+code Del: spam -- https://master.php.net/note/delete/116108/spam Del: non-english -- https://master.php.net/note/delete/116108/non-english Del: in docs -- https://master.php.net/note/delete/116108/in+docs Del: other reasons-- https://master.php.net/note/delete/116108 Reject -- https://master.php.net/note/reject/116108 Search -- https://master.php.net/manage/user-notes.php